Dragons are creatures with nearly unlimited life spans. They can survive for long periods of time, and no one has found a dragon that has died of old age. Adolescence is usually marked by the growth of a hatchling's wings, although not all breeds of dragons grow wings and some breeds have other traits that indicate the beginning of maturation. Once they hit adolescence, hatchlings change quickly, maturing to their full forms in only 2 years.

Dragons don't communicate with each other verbally, but they will growl to scare off predators and frighten prey. Young dragons will emit an extremely high-pitched squeal when they are frightened. To communicate, they use telepathy with each other and to speak to other creatures.

Mint colored dragons are the most peaceful of all dragons; they only eat plants unless they scavenge meat from an already dead animal. They also have no ways to attack others or defend themselves. They are much smaller than other forms of dragons since they only double in size when they mature. Mint dragons are unable to use magic and cannot fly since they lack wings. Their looks have given rise to the common insult of calling dragons "large lizards."

Aethia does her best to wreak havoc on the others, whether it's in the form of her unearthing Leafbird or triggering violent fights between Hydrangeas' heads. Rather than being a hindrance, her size (or rather, lack thereof) allows her to sneak past the rest of the dragons, plant a metaphorical time bomb, and sneak back out again without having been noticed at all. By the time that the inevitable explosion (occasionally literal) occurs, she usually can be found far from the scene of the crime... even if said scene is mobile and out for her blood, such as how Leafbird is after having been awoken from a nap. But despite her numerous flaws, she does have her good points as well. She's intelligent (although that often could be considered one of the aforementioned flaws, considering how she makes use of her cunning), cheerful, and has what she considers to be a good sense of humor, although many others would beg to differ.